It's been stated that Cyseal (one map "region") is about 20-30% of the game, so there will probably be 4 or 5 such "regions" in the final game total. Of those, Larian/videos have confirmed at least two other "towns/villages" - Silverglen and Luculla (or whatever the orc village is called). Unless you have inside info, everything else is pure guesswork at this point.
Yeah there should be Silverglen in release at least because there is already a quest to deliver something you find in beta map to one of the Silverglen inhabitants. Or they forgot to remove that quest.
I believe there should be additional beta at least to early backers of specific tier with ALL the content in game. Otherwise if even this one map is such a mess and some quests are broken or can't be completed, if we have 3 more areas in game full of quests then either they won't push them out on erode lease which would be really SAD, or they gonna beta them internally? Which would possibly make the release full of bugged quests?